#!/usr/bin/env python
# coding=utf-8

class ContextManagerOpenDemo(object):
    def __init__(self, filename, mode):
        self.filename = filename
        self.mode = mode

    def __enter__(self):
        print("Starting the Manager.")
        self.open_file = open(self.filename, self.mode)
        return self.open_file

    def __exit__(self, *others):
        self.open_file.close()
        print("Exiting the Manager.")
    
    #def __exit__(self, exc_type, exc_value, exc_traceback):
        #return SyntaxError != exc_type
        #return False

with ContextManagerOpenDemo("23501.txt", 'r') as reader:
#with ContextManagerOpenDemo():
    print("In the Manager.")
    for line in reader:
        print(line)

